Automatic air mixing apparatus for internal combustion motors



June 9, 1931. HART 1,808,814

AUTOMATIC AIR MIXING ARPARATUS FOR INTERNAL COMBUSTION MOTORS Filed June 21, 1928 Patented June 9, 1931 UNITED S TES PATENT l 'csiihj LOREN-A. HART, or crrannnvoix, 'mroniean AUTOMATIC AIR MIXING memes ron QZNTERNAL ooMBUsrIoiv Morons 3 Application filed. :J'une 21,

vide an automatic air mixing apparatus for internal combustion motors that cracks up and gasifies the heavieroils in our present day gasoline as well as low test fuel oils,

which would otherwise enter the cylinder in.

'uncracked globules suspended in the air.

if A still further object of this invention is to provide an air mixing device thatdoes not obstruct the passageway of the intake manifold, thereby reducingtheamount of the fuel charge that passes through the same. A still further objectof this invention is to provide an air mixing device that is easily and readily attached without the services of a skilled mechanic. I

A still further object ofthis invention is to provide an automatic airfinlet apparatus for intake manifolds that is economical in manufacture and durable and eflicient in use 8 These and other ob ects apparent 7 su te those skilled in the art. i

My invention consists in the construction, arrangement" and combination of the various parts ofthe device, whereby the ob'ects contemplated are attained as hereina er more fully set forth, pointed out in my claims and illustrated in the accompanying drawings, inwhich: V

. Fig. 1 is a side view of an internal combustion motor with my device threaded into the intake manifold and ready for use. Fig. 2 is a side sectional view of my invention and more fully illustrates its construction. r

Fig; 3 is asideview Of the devicesecured to an intake manifold and istaken on line '3.3 of Fig. 1. y V

By scientific tests it has been found that when the motor is turning over very slowly, little if any air should be permitted to enter the fuel charge, and when it is revolving at practicable; Thebody of my device is desigcoil spring 2e for yieldingly holdingth'e pis- "ton in the rear'portion of the body 13; The

-engagement with the same. The tapered for- 20,;to open and closethat opening gradually.

1928. Serial No. 287,310.

It is with the. above in view that I have 1 created my automatic air mixing apparatus.

I have designated the'intake manifold of an ordinary internal combustion motor by the numeral 10 havingv the carburetor 11. In Fig. 7

-1,*I have designated my device generally by the numeral 12, which is threaded into the V manifold 10 as near to the carburetor as is nated by the numeral 13, having the reduced end 14:. designed to be threadedinto the intake manifold as shownin Fig. 3. The numeral15 designates a longitudinal bore in the endportion of the body 13, adjacent the re- I 'duced end. "The numeral 16 designates passageway in the reduced end portion communicating withthe'b0re15 and the outside atmosphere. Communicating with the bore 15 is a second longitudinal bore 17, as shown in .Fig. 2. This last mentioned bore leaves the opposite'end of the body'13 open as will 7 be noted. Threaded into this bore 17, is the 7 cap member 18 having thehole 19. The nu- ,7,

meral 20 designates a hole in the side ofthe' body member 13, communicating with the bore 15 and in relatively close proximity to the inside the bore 17' is the head portion 22.

Embracingthe piston 21, engaging the head- 22 and the shoulder 23 in the casing is the shoulder '23 slopes inwardly toward the pas- LSageway 16,]as shown in'Fig. 2 providing an a-i'ntightfit when the piston 21' is pulled into ward end 26 of the piston is formed not only to conform to thesloping shoulder of valve seat 25, but when passing the passageway "To'linstallthe' invention it is merely necessary to drill a hole in the intake manifold, tap and same, then screw the reduced end portion of the device into the hole. The position of this hole in the intake manifold may be any location, but preferably as close to the carburetor as possible. To adjust the device to'the motor to which it is attached, the motor is first throttled to a very slow speed, and the light coil spring is pulled apart or compressed by the fingers-or pliers until its resiliency is such that the suction in the manifold will pull the piston forward in its bore and close the 'hole2 O thereby preventing any air to. enter the manifold when the motor is running slowly. As soon as the motor is speeded up the suction in the manifold will be. reduced and the piston will be allowed to slide back wardly in the bore to a position where air may enter through the hole 20 and pass into the manifold. The faster the motor runs the moreair is required for its proper functi0ning. As no part of the device extends into the passageway of the intake manifold thearea of that passageway will not .be affected. -As we have seen the successful functioning of the device at variousmotor speeds depends on the proper reciprocation of'the piston. This. reciprocation is automatically obtainedby the suction in the manifoldwhen the motor isrotating very slowly, and the lack of enoughsuction to compress the spring 24 when the motor is turning over very rapidly. The spring 24 moves the piston to the rear when little vacuiun exists at the for ward end of the piston and when a suliicient vacuum does eXis-tforward of the piston, the atmospheric pressure engaging the head 22 will force the piston forwardly against the coil spring 24 and close the passageway 20.. The hole 19 makesit possible for the outside atmosphere to contact the rear 1 side of the member 22 and also permits air to escape when the piston is moved to tll( 3:1&l by the spring 24. To clean the device, or to remove. the piston and spring it is merely necessary to un-' purpose of my invention, and itis my intention to cover by my claims any modified forms of structure or use of'mechanical equivalents which may be reasonably included within their scope. liclaimz' h I, 1. In a device of theclass described, a

body member designed to be screwed into the intake manifold ofan internal-combusgaging said head and said shoulder.

for inclosing said second borer tion motor, a bore in said bodymember communicating with the inside of said manifold, a second bore in the rear portion of said body member communicating with the first mentioned bore, a shoulder in said last mentioned bore, a passageway in'said body member communicating with the outside atmosphere and the first mentionedbore, a piston slidably mounted in said bores, a head formed on the rear end of said piston, and a coilspring embracing said piston and en- 2. Ina device of the class described, a body member designed to be threaded into the intake manifold of an internal combustion motor, a bore insaidbody member commnnicating with the inside of said manifold,

a second bore in the rear. portion of 'said body member of greater. diameterthan 'said first mentioned bore; and communicating;-

with said first mentioned bore, a piston slidably mounted in said bores, a head formed on the rear end of said piston and in said second bore and of greater diameterthan said first bore, a coil spring around said-piston and-T having one endengaging said head andiits other end engaging the shoulder createdby said first and second bores, and a passageway.

insaid body communicating with the outside atmosphere .and, the said first mentionedi...

bore. 1 v

'3. In a device a body member designed tozbe screwed into the intake manifold lof aninternal combus- 131011 motor, a bore in said'body member com-M municating with the inside of the said mani- ,fold, an air inlet leading into saidbore, a

second bore communicating with the-first bore and leaving the rear end offthe body member open, -a shoulder formed in said second bore, a piston'slidably'mounted in said bores, a head formed on the rear .end of said piston, a coilspring embracing said piston and engaging said head and said shoulder,

and a cap member having an opening for inclosing said second bore.

4, In a device of the class describedf'a body member designed to be screwed into the intake manifold of an internal combusmunicating with the inside of the said maniiofnthe class described,.a

tion motor, a bore in said body member comfold, an air inlet leading into said bore, a.

second bore communicating with the first bore and leaving [the rear end of the body a member open, a shoulder in said body mem-' ber and atthe' forward end of said second bore, a piston slidably mounted in saidbores, a head formedon the rear end of said piston, a coil spring embracing said piston and engaging said head and said shoulder, and a detachable cap memberhavingan, opening 5. In a device of the class described, a

b er. m m r d g e 9 ,be s r wed int the intake manifold of the internal combustion motor, a bore in said body member, a small passageway in the end of said body member that is threaded into said manifold communicating with said bore and the inside of the said intake manifold, a forwardly and inwardly sloping shoulder around said passageway and at the forward end of said bore,

a passageway in said body member communicating with the outside atmosphere and said bore, a second bore in the rear portion of said body member communicating with the first mentioned bore, a shoulder at the forward end of said second bore, a passage- V and a coil spring embracing said piston and engaging said head andthe said shoulder at the forward end of said second bore. a I

LOREN A. HART. 

